/Engine/Source/Runtime/GeometryCore/Public/DynamicMesh/DynamicMeshAttributeSet.h
Standard UV overlay type - 2-element float
typedef [TDynamicMeshVectorOverlay](API\Runtime\GeometryCore\DynamicMesh\TDynamicMeshVectorOverlay)< float, 2, FVector2f > FDynamicMeshUVOverlay